» Articles » PMID: 39956139

Interleaved Whole Brain Na-MRI and P-MRSI Acquisitions at 7 Tesla

Overview
Journal NMR Biomed
Publisher Wiley
Date 2025 Feb 16
PMID 39956139
Authors
Affiliations
Soon will be listed here.
Abstract

Non-H nuclei magnetic resonance spectroscopy (MRS) offers insights into metabolism, which may aid for example early stages of disease diagnosis, tissue characterization or therapy response evaluation. Sodium MRI can provide valuable information about tissue health and cellular function. When combined with P MR spectroscopic imaging (MRSI), complementary metabolic information on energy metabolism and cell proliferation can be obtained. However, sensitivity challenges stemming from low natural abundances and low gyromagnetic ratios of different nuclei have hindered progress. Besides, due to hardware constraints, different nuclei are often studied separately, and the need for dedicated hardware for x-nuclei imaging hampers clinical efficiency and patient-friendly assessments. This work introduces an interleaved acquisition scheme for 3D P-MRSI and 3D radial Na-MR imaging (Na-MRI) at 7 Tesla (7T) and demonstrates the feasibility of interleaving these two nuclei acquisitions. The interleaved protocol effectively merged P-MRSI with Na-MRI, while remaining within specific absorption rate (SAR) limits. Results revealed comparable signal-to-noise ratios (SNRs) and spectral quality between interleaved and non-interleaved scans, highlighting the approach's efficiency without compromising data quality.

References
1.
Huhn K, Engelhorn T, Linker R, Nagel A . Potential of Sodium MRI as a Biomarker for Neurodegeneration and Neuroinflammation in Multiple Sclerosis. Front Neurol. 2019; 10:84. PMC: 6378293. DOI: 10.3389/fneur.2019.00084. View

2.
Korzowski A, Weinfurtner N, Mueller S, Breitling J, Goerke S, Schlemmer H . Volumetric mapping of intra- and extracellular pH in the human brain using P MRSI at 7T. Magn Reson Med. 2020; 84(4):1707-1723. DOI: 10.1002/mrm.28255. View

3.
Korzowski A, Weckesser N, Franke V, Breitling J, Goerke S, Schlemmer H . Mapping an Extended Metabolic Profile of Gliomas Using High-Resolution P MRSI at 7T. Front Neurol. 2022; 12:735071. PMC: 8733158. DOI: 10.3389/fneur.2021.735071. View

4.
Friedman S, Jensen J, Frederick B, Artru A, Renshaw P, Dager S . Brain changes to hypocapnia using rapidly interleaved phosphorus-proton magnetic resonance spectroscopy at 4 T. J Cereb Blood Flow Metab. 2006; 27(3):646-53. DOI: 10.1038/sj.jcbfm.9600383. View

5.
Paech D, Regnery S, Platt T, Behl N, Weckesser N, Windisch P . Assessment of Sodium MRI at 7 Tesla as Predictor of Therapy Response and Survival in Glioblastoma Patients. Front Neurosci. 2021; 15:782516. PMC: 8671745. DOI: 10.3389/fnins.2021.782516. View